FE/Qt: language string updates.
FE/Qt: Hungarian NLS update, thanks to George Hron.
FE/Qt4-OSX: fix the translation of the application menu
FE/Qt4-NLS: Merged sv, hu and lt.
FE/Qt4-nls: merged Chinese Taiwan, Hungarian and Khmer
FE/Qt4-NLS: Updated Bulgarian, Italian, Serbian, Hungarian & Catalan.
FE/Qt4-NLS: updated qt_* translation files to 4.4.3
renamed VirtualBox4 to VirtualBox
purge the obsolete Qt3 GUI
FE/Qt: Updated Swedish translation; Added Hungarian and Finnish translations.